Compare Dirt Bikes

Pick any two bikes to see specs and photos side by side. Differences are highlighted. Blank = not yet verified for that year-model (we don’t guess).

Kawasaki

2023 Kawasaki KX450

Yamaha

2023 Yamaha YZ450FX

Class	450cc 4-stroke	450cc 4-stroke
Displacement	—	450cc
Bore × stroke	—	97 × 60.9 mm
Cooling	—	—
Induction	Single-cylinder, air-cooled engine with a single overhead valve (SOV)	Mikuni fuel injection, 44mm
Power valve	—	—
Starter	Electric starter	—
Transmission	5-speed	5-speed
Front suspension	43 mm inverted telescopic fork	KYB spring-type fork with speed sensitive damping; fully adjustable, 12.2-in travel
Front travel	120 in	12.2 in
Rear travel	160 in	12.5 in
Front brake	285mm	270mm
Rear brake	245mm	240mm
Front wheel	—	—
Rear wheel	—	—
Seat height	690 in	37.6 in
Wheelbase	52.5 in	58.3 in
Weight	230 lb (Dry weight (with full tank of fuel and chain lube))	254 lb (wet weight)
Fuel capacity	1.7 gal	2.2 gal
MSRP	—	—

Highlighted (blue) values differ. Verified manufacturer data; see each bike’s page for sources. Torque/fluid specs are on the individual pages (service-manual only).